This text presents a reader-friendly introduction to the basic principles of experimental psychological research. Research Methods, Design, and Analysis is organized so that each chapter focuses on a specific step in the research process. This text provides instruction in experimental research as well as non-experimental approaches such as ex-post facto research, correlational research, and survey research. Also included are qualitative research approaches such as ethnography and phenomenology. The current edition, while maintaining detailed coverage of the experimental method, has expanded coverage on nonexperimental methods as well as expanded coverage of data analysis.